cbcvebase.
CVE-2024-36930
published 2024-05-30

CVE-2024-36930: In the Linux kernel, the following vulnerability has been resolved: spi: fix null pointer dereference within spi_sync If spi_sync() is called with the…

PriorityP418medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
13.4th percentile
In the Linux kernel, the following vulnerability has been resolved: spi: fix null pointer dereference within spi_sync If spi_sync() is called with the non-empty queue and the same spi_message is then reused, the complete callback for the message remains set while the context is cleared, leading to a null pointer dereference when the callback is invoked from spi_finalize_current_message(). With function inlining disabled, the call stack might look like this: _raw_spin_lock_irqsave from complete_with_flags+0x18/0x58 complete_with_flags from spi_complete+0x8/0xc spi_complete from spi_finalize_current_message+0xec/0x184 spi_finalize_current_message from spi_transfer_one_message+0x2a8/0x474 spi_transfer_one_message from __spi_pump_transfer_message+0x104/0x230 __spi_pump_transfer_message from __spi_transfer_message_noqueue+0x30/0xc4 __spi_transfer_message_noqueue from __spi_sync+0x204/0x248 __spi_sync from spi_sync+0x24/0x3c spi_sync from mcp251xfd_regmap_crc_read+0x124/0x28c [mcp251xfd] mcp251xfd_regmap_crc_read [mcp251xfd] from _regmap_raw_read+0xf8/0x154 _regmap_raw_read from _regmap_bus_read+0x44/0x70 _regmap_bus_read from _regmap_read+0x60/0xd8 _regmap_read from regmap_read+0x3c/0x5c regmap_read from mcp251xfd_alloc_can_err_skb+0x1c/0x54 [mcp251xfd] mcp251xfd_alloc_can_err_skb [mcp251xfd] from mcp251xfd_irq+0x194/0xe70 [mcp251xfd] mcp251xfd_irq [mcp251xfd] from irq_thread_fn+0x1c/0x78 irq_thread_fn from irq_thread+0x118/0x1f4 irq_thread from kthread+0xd8/0xf4 kthread from ret_from_fork+0x14/0x28 Fix this by also setting message->complete to NULL when the transfer is complete.

Affected

15 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.94-1 (bookworm)linux 6.1.94-1 (bookworm)
linuxlinux
linuxlinux>= ae7d2346dc89ae89a6e0aabe6037591a11e593c0 < e005d6754e3e440257006795b687c4ad8733b493e005d6754e3e440257006795b687c4ad8733b493
linuxlinux>= ae7d2346dc89ae89a6e0aabe6037591a11e593c0 < a30659f1576d2c8e62e7426232bb18b885fd951aa30659f1576d2c8e62e7426232bb18b885fd951a
linuxlinux>= ae7d2346dc89ae89a6e0aabe6037591a11e593c0 < 2070d008cc08bff50a58f0f4d30f12d3ebf94c002070d008cc08bff50a58f0f4d30f12d3ebf94c00
linuxlinux>= ae7d2346dc89ae89a6e0aabe6037591a11e593c0 < 4756fa529b2f12b7cb8f21fe229b0f6f471908294756fa529b2f12b7cb8f21fe229b0f6f47190829
linuxlinux_kernel>= 0 < 6.1.94-16.1.94-1
linuxlinux_kernel>= 0 < 6.8.11-16.8.11-1
linuxlinux_kernel>= 0 < 6.8.11-16.8.11-1
linuxlinux_kernel>= 0 < 6.8.0-40.406.8.0-40.40
linuxlinux_kernel>= 6.0 < 6.1.916.1.91
linuxlinux_kernel>= 6.2 < 6.6.316.6.31
linuxlinux_kernel>= 6.7 < 6.8.106.8.10
msrcazl3_kernel_6.6.29.1-5_on_azure_linux_3.0
msrcazl3_kernel_6.6.35.1-4_on_azure_linux_3.0

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv6.5MEDIUM
vendor_ubuntu6.5MEDIUM
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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